#!/usr/bin/env python3

import argparse
import os
import sys

import common
import shell_helpers
from shell_helpers import LF

container_name = common.consts['repo_short_id']
container_hostname = common.consts['repo_short_id']
image_name = common.consts['repo_short_id']
target_dir = '/root/{}'.format(common.consts['repo_short_id'])
docker = ['sudo', 'docker']
def create(args):
    sh.run_cmd(docker + ['build', '-t', image_name, '.', LF])
    # --privileged for KVM:
    # https://stackoverflow.com/questions/48422001/launching-qemu-kvm-from-inside-docker-container
    sh.run_cmd(
        docker +
        [
            'create', LF,
            '--hostname', container_hostname, LF,
            '-i', LF,
            '--name', container_name, LF,
            '--net', 'host', LF,
            '--privileged', LF,
            '-t', LF,
            '-w', target_dir, LF,
            '-v', '{}:{}'.format(os.getcwd(), target_dir), LF,
            image_name,
        ]
    )
def destroy(args):
    stop(args)
    sh.run_cmd(docker + ['rm', container_name, LF])
    sh.run_cmd(docker + ['rmi', image_name, LF])
def sh_func(args):
    start(args)
    if args:
        sh_args = args
    else:
        sh_args = ['bash']
    exit_status = sh.run_cmd(
        docker + ['exec', '-i', '-t', container_name] +
        sh_args +
        [LF],
        raise_on_failure=False
    )
    sys.exit(exit_status)
def start(args):
    sh.run_cmd(docker + ['start', container_name, LF])
def stop(args):
    sh.run_cmd(docker + ['stop', container_name, LF])
cmd_action_map = {
    'create': lambda args: create(args),
    'DESTROY': lambda args: destroy(args),
    'sh': lambda args: sh_func(args),
    'start': lambda args: start(args),
    'stop': lambda args: stop(args),
}
parser = argparse.ArgumentParser()
parser.add_argument('--dry-run', default=False, action='store_true')
parser.add_argument('cmd', choices=cmd_action_map, default='sh', nargs='?')
parser.add_argument('args', nargs='*')
args = parser.parse_args()
sh = shell_helpers.ShellHelpers(dry_run=args.dry_run)
cmd_action_map[args.cmd](args.args)
